The kit is based on the robby created parking distance hardware. http://www.mp3car.com/hardware-devel...dc-usb-21.html First page has all the details and you can make your own board, just getting the preprogrammed pic is the hard part. you can get the sensor kit pretty cheap on e-bay. If you need a link I can provide to a seller in the UK but he ship's out fast and shipping charge is reasonable. SNO